My LG 55" LV9500 loses sound when switching from a standard def (480p) channel to a high def (720p or 1080p) channel. Then if I switch it back to SD the sound will come back. Yet EVERY time I want to watch a channel in HD I have to either turn my tv off and on again or go into my output resolution settings and uncheck 720p/1080p then recheck it again (even though it's already set to automatic). Is it the hdmi cable? The tv? The cable box? Any help would be greatly appreciated as it's driving me insane!

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I have the same set, same problem with one of my MOTOROLA boxes, but not with another. I have a SONY TV that works fine with this new MOTO box, but the new VIZIO does not. The audio is coming through the HDMI cable just fine, and the fact that it works when you cycle power on your TV means it's the SYNC between the TV and the BOX. I have the identical problem and am taking back the MOTO box for another one. I spoke to VIZIO for about 45 minutes trying different things. They think it's the MOTOROLA box, COX (my cable company) thinks it's this particular box, who knows.

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According to the owner's manual page 2.7 (and this is an OLD [by HDTV standards] set), the TV can only handle input resolutions of 480p or 1080i on the composite inputs. Most HDTV programming today is 720p with some 1080i and 1080p on certain channels (like some Discovery shows about nature). It is possible that your set will not process the 720p signals being sent.

Your HDTV is capable of up to 1080P resolution. SDTV (standard def) signals are 480i; EDTV (enhanced def) is 480P; HDTV are 720P, (there is no 720i) 1080i and 1080P. Generally, those modes ending in "P" look better than those ending in "i". 1080i is the highest possible for broadcast TV, but BluRay disks and Directv have 1080P display capabilities.

The double picture you're describing sounds like the TV is set to display only standard or enhanced def signals while the Dish Network box is supplying it with HD signals. You should locate the control for the TV's resolution and make sure it is set to "1080P" and then set the output of your Dish Network set top box to the highest output it offers. Do the same for your BluRay player and any other devices, too.

Once set correctly, you should have a great picture once again. I hope this helps & good luck!

If [Composite / S Video] is selected in step 4, the screen for selecting resolutions will not be displayed.
If [HDMI] is selected, you can also select to automatically adjust the
resolution (the HDMI device must be turned on). In this case, the screen
for selecting resolutions will not be displayed.
7.
Set the TV type.
Select the type of TV in use. Set when only SD resolution (NTSC:480p /
480i, PAL: 576p / 576i) is to be output such as when [Composite / S
Video] or [AV MULTI / SCART] is selected in step 4.
8.
Check your settings.
Confirm that the image displayed is at the correct resolution for the
TV. You can go back to a previous screen and revise the settings by
pressing the button.
9.
Save your settings.
The video output settings are saved on the PS3™ system. You can continue
on to set audio output settings. For details on audio output, see (Settings) > (Sound Settings) > [Audio Output Settings] in this guide.

Kind of. It is capable of 720p. So channels like FOX, the ESPN channels, SPEED, and other 720p broadcasts will look fantastic on that display. However, the 1080i broadcasts will be shrunk to fit your screen. They'll still look pretty good, though. Most people consider HDTV to be anything above & beyond 480p (so, 720p, 1080i, 1080p).

*3 Composite is the connector used to connect the AV cable that is supplied with the PS3™ system. S VIDEO is a format mainly used in Japan.

*4 AV MULTI is a format mainly used in Japan. SCART is a format mainly used in Europe. If [AV MULTI / SCART] is selected, the screen allowing you to select the type of output signal will be displayed.

5. Change video output settings.Change the resolution for the video output. Depending on the connector type selected in step 4, this screen may not be displayed.

6. Set the resolution.Select all resolutions supported by the TV in use. Video will automatically be output at the highest resolution possible for the content you are playing from among the selected resolutions.* * The video resolution is selected in order of priority as follows: 1080p > 1080i > 720p > 480p/576p > Standard (NTSC:480i/PAL:576i).
If [Composite / S Video] is selected in step 4, the screen for selecting resolutions will not be displayed.If [HDMI] is selected, you can also select to automatically adjust the resolution (the HDMI device must be turned on). In this case, the screen for selecting resolutions will not be displayed.

7. Set the TV type.Select the type of TV in use. Set when only SD resolution (NTSC:480p / 480i, PAL: 576p / 576i) is to be output such as when [Composite / S Video] or [AV MULTI / SCART] is selected in step 4.

8. Check your settings.Confirm that the image displayed is at the correct resolution for the TV. You can go back to a previous screen and revise the settings by pressing the button.

9. Save your settings.The video output settings are saved on the PS3™ system. You can continue on to set audio output settings. For details on audio output, see (Settings) > (Sound Settings) > [Audio Output Settings] in this guide.